7.4 Cons of Angular Momentum

Ans: 5>1=4>2=3

The Law of Conservation of Angular Momentum is a fundamental principle in physics that states the total angular momentum of a closed system remains constant if no external torques are applied. This concept is crucial for understanding rotational dynamics in various physical systems, from spinning toys to orbiting planets.

In practice, the law of conservation of angular momentum means that if the total external torque acting on a system is zero, the total angular momentum of the system cannot change. This conservation can be observed in everyday phenomena such as a figure skater spinning faster when they pull their arms in close to their body. By reducing their moment of inertia, their angular velocity increases to keep the angular momentum constant in the absence of external torques.

The Law of Conservation of Linear Momentum is a foundational principle in physics that asserts the total linear momentum of a closed system remains constant if no external forces are acting on it. This law is central to analyzing and understanding the behavior of objects in motion in various physical contexts, from collisions to rocket propulsion.

In practical terms, the conservation of linear momentum implies that if two or more objects interact in a system where no external forces interfere (like friction or air resistance), the total momentum before the interaction will equal the total momentum after the interaction. This conservation is evident in phenomena such as collisions between objects. For instance, in a perfectly elastic collision where two billiard balls collide, the total momentum of the balls before and after the collision remains unchanged, though their individual momenta might change.